A Little "Salt"

It began with a note left on our whiteboard in the back area behind the fish. 

"The bucket of Salt is in Iso." 

Which I thought. O.o That's a weird place for it to be. 
Because this particular "bucket of salt" we only use in relation to making our ornaments safe to place in our fish tanks again after we bleach them.
Because every week, we take out all the ornaments in the tank (certain sections each day) and bleach them to get any algae that may be attempting to grow, off of them. 
We then place them in a fresh bucket of water and add in the "Salt" -which is Sodium Thiosulfate in to negate any bleach that may still be on the ornaments.

Basically Sodium Thiosulfate is a Dechlorinator, that is often used to treat Chlorine levels in Swimming Pools and such.
So it's a lot more concentrated than the little bottles of liquid we sell off the shelf that take chlorine out of tap water. 

So again, knowing this info....
Why would anyone take this "bucket of salt" into our sick room?

Because there's nothing back there that's needed. 

But if my coworker thought it was regular Aquarium Salt, that can be used to help fish that are suffering from...I think it was Dropsy? Along with other issues...than maybe they treated our sick tank that was in our sick room with it? 

:S 
Which.
Turns out that assumption was correct. *face palm* 
It seems like whoever wrote the note....decided to put this "Salt" in our sick tank. To treat the fish.

And it didn't turn out well. 
>.< 
No. All but 2 of the fish that were back there for various issues....had died. 

Like a dozen fish.
Dead.
Because one of my coworkers thought using the Sodium Thiosulfate was a good idea. 
*exhales*

So I did a half water change...and hopefully that's enough to ensure that the other two fish still in the tank live. *fingers crossed* 

-Sarnic Dirchi